新的Postgresql DB中的UUID字段验证失败：[“'1'不是有效的UUID。”]

Question

想知道是否有人可以弄清楚该错误可能来自何处。我刚从sqllite迁移到Postgresql，同时将我的ID字段更改为UUID。对于大多数模型，它都可以工作，但是我隔离了一些导致迁移失败的模型。

错误是：

  

AttributeError：“ int”对象没有属性“ replace”   django.core.exceptions.ValidationError：[“'1'不是有效的UUID。”]

正如我所说的，这是一个新的数据库，并且不知道任何代码会在迁移时创建行，因此不确定1的来源。

此this documentation看起来非常相似，但是要求者明确设置了整数，并尝试将其作为UUID

传递

型号

import uuid

class Question(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)

踪迹

        Running migrations:
      Applying survey.0001_initial...Traceback (most recent call last):
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 2363, in to_python
        return uuid.UUID(value)
      File "/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/uuid.py", line 137, in __init__
        hex = hex.replace('urn:', '').replace('uuid:', '')
    AttributeError: 'int' object has no attribute 'replace'

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "manage.py", line 15, in 
        execute_from_command_line(sys.argv)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
        utility.execute()
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/core/management/__init__.py", line 365, in execute
        self.fetch_command(subcommand).run_from_argv(self.argv)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv
        self.execute(*args, **cmd_options)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute
        output = self.handle(*args, **options)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 200, in handle
        fake_initial=fake_initial,
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/migrations/executor.py", line 117, in migrate
        state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
        state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/migrations/executor.py", line 244, in apply_migration
        state = migration.apply(state, schema_editor)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/migrations/migration.py", line 122, in apply
        operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/migrations/operations/fields.py", line 84, in database_forwards
        field,
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 407, in add_field
        definition, params = self.column_sql(model, field, include_default=True)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 152, in column_sql
        default_value = self.effective_default(field)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 224, in effective_default
        default = field.get_db_prep_save(default, self.connection)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/models/fields/related.py", line 936, in get_db_prep_save
        return self.target_field.get_db_prep_save(value, connection=connection)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 767, in get_db_prep_save
        return self.get_db_prep_value(value, connection=connection, prepared=False)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 2354, in get_db_prep_value
        value = self.to_python(value)
      File "/Users/jd/.virtualenvs/projectrisk_dev/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 2368, in to_python
        params={'value': value},
    django.core.exceptions.ValidationError: ["'1' is not a valid UUID."]